How to Use

Enter a value

Type a rem or pixel value. For example, 1.5 for rem, or 24 for pixels.

Set base size

The default base font size is 16px. Adjust it if your project uses a different root size.

Convert

Click REM → PX to convert rem to pixels, or PX → REM to convert pixels to rem.

About REM to PX

When you are reading or auditing REM-based CSS, knowing the exact pixel size rendered can save a debugging session. ILikePdf REM to PX converts REM values — single or as a scale — into pixels against a configurable root font size. It is the perfect companion for reviewing design tokens, documenting responsive scales, or translating a stylesheet back into pixel specs. Every conversion happens instantly in your browser.

How to convert REM to PX REM to PX

Step 1: Enter a REM value or list, like "1.5, 2, 2.5".

Step 2: Set the root font size if it isn't 16px.

Step 3: Read the exact pixel equivalent instantly.

Step 4: Copy the result into your CSS or docs.

Common use cases for REM to PX

Check the rendered size of REM values in pixels.
Document design tokens in both units.
Verify responsive sizes across root font settings.
Convert stylesheets from REM to pixel specs.

Pro tips

The root font size determines the conversion — confirm it matches your project.
Use the list mode to convert a whole scale at once.
Runs instantly, entirely in the browser.

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REM to PX